4f4c4942-4343-5764-6473-313039393830 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-03T17:14:21.791Z NRW 1.0 wel British National Grid (EPSG::27700) Coastal Saline Lagoons and Pools in Wales Coastal Saline Lagoons and Pools in Wales Lagwnau a phyllau hallt arfordirol yng Nghymru 1998 CCW/NHM Wales saline lagoons and pools survey JNCCMNCR40000799 2000-04-30 NRW_DS109980 The Natural History Museum was asked by the Countryside Council for Wales (CCW) to undertake a survey of all potential lagoonal or coastal brackish pond sites in Wales. This dataset presents the results of that survey, conducted during December 1998 as well as the results of the review and proposals for the monitoring and conservation of the coastal saline lagoons in Wales. Lagoons are an unusual and rare habitat, both in the UK (total resource ca 5,000 ha) and elsewhere. The characteristic lagoon community includes species almost or entirely restricted to lagoonal habitats in the United Kingdom, where they represent some of our rarest plants and animals; nine lagoonal species are currently protected under Schedules 5 and 8 of the Wildlife and Countryside Act (1981). Survey of lagoonal habitats in Wales to identify lagoons and pools and carry out an assessment of condition and monitoring. The Natural History Museum was asked by the Countryside Council for Wales (CCW) to undertake a survey of all potential lagoonal or coastal brackish pond sites in Wales. This dataset presents the results of that survey, conducted during December 1998 as well as the results of the review and proposals for the monitoring and conservation of the coastal saline lagoons in Wales. Lagoons are an unusual and rare habitat, both in the UK (total resource ca 5,000 ha) and elsewhere. The characteristic lagoon community includes species almost or entirely restricted to lagoonal habitats in the United Kingdom, where they represent some of our rarest plants and animals; nine lagoonal species are currently protected under Schedules 5 and 8 of the Wildlife and Countryside Act (1981). Survey of lagoonal habitats in Wales to identify lagoons and pools and carry out an assessment of condition and monitoring. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Countryside Council for Wales (CCW) Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Species distribution Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Pickleridge lagoon substratum ganulometric analysis ganulometric analysis Morfa Gwyllt spit lagoon salinity lagoonal cockles Aber (Abergwyngregyn) coastal saline lagoon epizooites lagoons Sediment PSA Aberthaw Carew Castle mill pond physiography lagoonal coastal lagoon paralagoonal habitat benthos pools bryozoans saline lagoons marginal plants Penclacwydd Cemlyn Lagoon marine and freshwater inventory NRW Thesaurus 2026-03-02 geonetwork.thesaurus.local.theme.converted_nrw-keywords Shellfish morphology, age and physiology Concentration of organic matter in sediments SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW 2000. There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source. English environment biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer Wales (WLS) -5.777741 -2.608865 51.240829 53.513067 1998-12-01 1998-12-31 Senior Marine Monitoring Ecologist, NRW - Bamber, RN., Evans, NJ., Whittall, A. 2000. Survey of potential coastal saline lagoons and pools in Wales, December 1998. Countryside Council for Wales Science Report 377. Bangor. - Bamber, RN., Evans, NJ., Sanderson, WG., Whittall, A. Coastal saline lagoons and pools in Wales: Review and proposals. Countryside Council for Wales Science Report 464. Survey of potential coastal saline lagoons and pools in Wales, December 1998 Coastal saline lagoons and pools in Wales : review and proposals Database [A] Data in spreadsheet format (MS Excel) [B] Data in Marine Recorder (JNCCMNCR40000799) [C] Held in paper format as MNCR forms [D] Report (MS Word, 8 maps (tif format in Imaging for Windows) [E] 31 photos in .jpg (PhotoEditor) & .tif format (Imaging), 3 x .cdr files) Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false While there had been a number of surveys of saline lagoons in England and Scotland (e.g. Bamber, 1997; Covey, 1999), there had been no investigation of the saline lagoon resource of Wales other than the NCC survey in the mid 1980s (e.g. Barnes, 1987). This dataset represents the results of the first complete survey of lagoonal habitats in Wales since then. A total of 28 potential sites or ponds were assessed, 25 ponds visited, 18 sampled, of which 12 were deemed to be saline lagoons or coastal brackish ponds. At each site the physiography of the lagoon was assessed as were all water inputs (streams, sluices, weirs, etc.) and outflows. The surrounding habitat or human exploitation of the land was noted, as were marginal plants. Salinity was measured using a Reichert salinity refractometer. Semi-quantitative samples were collected from the substratum, the submerged plants and the water column of the lagoons. Sampling was predominantly by 0.5 mm mesh hand net. Fragments of submerged plant material and other hard substrata were also examined for bryozoans and other epizooites. Quantitative samples of the sedimentary benthos were collected from sites conjectured to be saline lagoons and also from para-lagoonal habitats for analytical comparison. At each of the twelve quantitative sample sites, a sample of whole surface sediment was collected for granulometric analysis and for analysis of organic content . Area and depth were measured and sites were photographed. Where found lagoonal cockles were measured to aid interpretation of year classes. While there had been a number of surveys of saline lagoons in England and Scotland (e.g. Bamber, 1997; Covey, 1999), there had been no investigation of the saline lagoon resource of Wales other than the NCC survey in the mid 1980s (e.g. Barnes, 1987). This dataset represents the results of the first complete survey of lagoonal habitats in Wales since then. A total of 28 potential sites or ponds were assessed, 25 ponds visited, 18 sampled, of which 12 were deemed to be saline lagoons or coastal brackish ponds. At each site the physiography of the lagoon was assessed as were all water inputs (streams, sluices, weirs, etc.) and outflows. The surrounding habitat or human exploitation of the land was noted, as were marginal plants. Salinity was measured using a Reichert salinity refractometer. Semi-quantitative samples were collected from the substratum, the submerged plants and the water column of the lagoons. Sampling was predominantly by 0.5 mm mesh hand net. Fragments of submerged plant material and other hard substrata were also examined for bryozoans and other epizooites. Quantitative samples of the sedimentary benthos were collected from sites conjectured to be saline lagoons and also from para-lagoonal habitats for analytical comparison. At each of the twelve quantitative sample sites, a sample of whole surface sediment was collected for granulometric analysis and for analysis of organic content . Area and depth were measured and sites were photographed. Where found lagoonal cockles were measured to aid interpretation of year classes.